docs: def cklpf(filename):
      """
      Load a CK pointing file for use by the CK readers.  Return that
      file's handle, to be used by other CK routines to refer to the
      file.
  
      http://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/cklpf_c.html
  
      :param filename: Name of the CK file to be loaded.
      :type filename: str
      :return: Loaded file's handle.
      :rtype: int
      """
      filename = stypes.stringToCharP(filename)
      handle = ctypes.c_int()
      libspice.cklpf_c(filename, ctypes.byref(handle))
      return handle.value